Poultry disease and its control require effective co-operation and communication between the poultry producer, their veterinary surgeon and other professional scientists and experts. The most effective way to ensure health and welfare requires a three-way dialogue between all the interested parties. This paper sets out to discuss ways in which poultry veterinarians approach disease diagnosis, treatment and control, together with the important role liaison with nutritionists can have in resolving problems and ensuring optimal flock performance.